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15 years of NRPB (HPA) Validation Test
Results |
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KODALPHA RADON
DETECTORS |
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(RETOUR) |
( All analyses are done by the
DOSIRAD lab, in France ) |
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10 detectors |
10 detectors |
10 detectors |
Mean |
Total |
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Expected |
Mean |
SD (1sigma) |
SD (1sigma) |
Difference |
uncertainty |
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Dates |
Exposure |
Observed |
Observed |
Observed |
Obs. / Exp. |
=
square |
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results |
results |
results % |
% |
root (AČ+BČ) |
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kBq.h/m3 |
kBq.h/m3 |
kBq.h/m3 |
( A% ) |
( B% ) |
( C% ) |
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End-1992 |
416 |
433,5 |
26,53 |
6,12% |
4,21% |
7,43% |
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Mid-1993 |
512 |
518,9 |
67,51 |
13,01% |
1,35% |
13,08% |
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End-1993 |
427 |
425,1 |
14,02 |
3,30% |
-0,44% |
3,33% |
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Mid-1994 |
321 |
318,2 |
13,6 |
4,27% |
-0,87% |
4,36% |
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End-1994 |
261 |
266,9 |
10,95 |
4,10% |
2,26% |
4,68% |
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Mid-1995 |
371 |
362,8 |
13,5 |
3,72% |
-2,21% |
4,33% |
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End-1995 |
321 |
288,4 |
12,62 |
4,38% |
-10,16% |
11,06% |
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Mid-1996 |
221 |
226,8 |
10,14 |
4,47% |
2,62% |
5,18% |
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End-1996 |
149 |
137,8 |
13,72 |
9,96% |
-7,52% |
12,48% |
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340 |
323,4 |
21,82 |
6,75% |
-4,88% |
8,33% |
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1125 |
1187 |
47,21 |
3,98% |
5,51% |
6,80% |
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Mid-1997 |
452 |
483,1 |
19,39 |
4,01% |
6,88% |
7,97% |
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End-1997 |
73 |
73,5 |
6,45 |
8,78% |
0,68% |
8,80% |
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402 |
369,7 |
17,21 |
4,66% |
-8,03% |
9,29% |
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1113 |
1092,3 |
29,74 |
2,72% |
-1,86% |
3,30% |
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Mid-1998 |
265 |
285,6 |
16,36 |
5,73% |
7,77% |
9,66% |
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End-1998 |
235 |
242,3 |
11,65 |
4,81% |
3,11% |
5,72% |
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Mid-1999 |
415 |
422,2 |
18,89 |
4,47% |
1,73% |
4,80% |
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End-1999 |
365 |
394,4 |
15,21 |
3,86% |
8,05% |
8,93% |
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Mid-2000 |
390 |
422,1 |
15,67 |
3,71% |
8,23% |
9,03% |
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End-2000 |
141 |
152,6 |
13,44 |
8,81% |
8,23% |
12,05% |
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397 |
409,5 |
14,53 |
3,55% |
3,15% |
4,74% |
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1209 |
1287,1 |
26,73 |
2,08% |
6,46% |
6,79% |
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Mid-2001 |
359 |
404 |
17,06 |
4,22% |
12,53% |
13,23% |
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End-2001 |
358 |
355,5 |
12,57 |
3,54% |
-0,70% |
3,60% |
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Mid-2002 |
170 |
170 |
7,99 |
4,70% |
0,00% |
4,70% |
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365 |
375,4 |
15,99 |
4,26% |
2,85% |
5,12% |
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1582 |
1630,2 |
42,258 |
2,59% |
3,05% |
4,00% |
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End-2002 |
287 |
289 |
13,87 |
4,80% |
0,70% |
4,85% |
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Mid-2003 |
411 |
408 |
15,79 |
3,87% |
-0,73% |
3,94% |
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End-2003 |
302 |
305,3 |
13,37 |
4,38% |
1,09% |
4,51% |
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Mid-2004 |
421 |
458 |
15,8 |
3,45% |
8,79% |
9,44% |
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End-2004 |
363 |
387 |
13,17 |
3,40% |
6,61% |
7,44% |
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Mid-2005 |
341 |
371 |
13,72 |
3,70% |
8,80% |
9,54% |
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End-2005 |
301 |
286 |
10,81 |
3,78% |
-4,98% |
6,25% |
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Oct. 2006 |
304 |
304 |
11,64 |
3,83% |
0,00% |
3,83% |
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End-2006 |
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Mid-2007 |
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End-2007 |
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Validation tests requested by "Voltare Radon Analysis" (a DOSIRAD distributor in England) |
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for the KODALPHA "open" radon detector. |
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Validation tests requested by "Voltare Radon Analysis" for the |
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VOLALPHA, "open" radon
detector. A special KODALPHA
design for the English market. |
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Validation tests requested by "Radon Centre Ltd" (a new DOSIRAD distributor in England) |
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for the same VOLALPHA, "open"
radon detector. |
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The NRPB validates the detectors that have a total uncertainty
strictly < 15%, for radon exposures |
THE NRPB
validates the detectors that have a total uncertainty strictly <15%, for
radon exposures between 200 and 1000 kBq.h/m3 |
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Jean ANDRU |
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between 200 and 1000 kBq.h/m3 |
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